Prepare for responsive CSS animations.

Source/core/animation/KeyframeEffectModel.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/animation/KeyframeEffectModel.h"
 
 #include "core/StylePropertyShorthand.h"
 #include "core/animation/AnimationNode.h"
+#include "core/animation/css/CSSAnimatableValueFactory.h"
+#include "core/animation/css/CSSPropertyEquality.h"
+#include "core/css/resolver/StyleResolver.h"
 #include "platform/animation/AnimationUtilities.h"
 #include "platform/geometry/FloatBox.h"
 #include "platform/transforms/TransformationMatrix.h"
 #include "wtf/text/StringHash.h"
 
 namespace blink {
 
 PropertySet KeyframeEffectModelBase::properties() const
 {
     PropertySet result;
     for (const auto& keyframe : m_keyframes) {
         for (const auto& property : keyframe->properties())
             result.add(property);
     }
     return result;
 }
 
 void KeyframeEffectModelBase::sample(int iteration, double fraction, double iterationDuration, OwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation>>>& result) const
 {
     ASSERT(iteration >= 0);
     ASSERT(!isNull(fraction));
     ensureKeyframeGroups();
     ensureInterpolationEffect();
 
     return m_interpolationEffect->getActiveInterpolations(fraction, iterationDuration, result);
 }
 
+void KeyframeEffectModelBase::snapshotCompositableProperties(const Element* element, const RenderStyle& style)
+{
+    if (affects(CSSPropertyOpacity))
+        snapshotCompositableProperty(CSSPropertyOpacity, element, style);
+    if (affects(CSSPropertyTransform))
+        snapshotCompositableProperty(CSSPropertyTransform, element, style);
+    if (affects(CSSPropertyWebkitFilter))
+        snapshotCompositableProperty(CSSPropertyWebkitFilter, element, style);
+}
+
+bool KeyframeEffectModelBase::snapshotCompositablePropertiesIfNeeded(const Element* element, const RenderStyle& oldStyle, const RenderStyle& newStyle)
+{
+    bool changed = false;
+
+    if (!CSSPropertyEquality::propertiesEqual(CSSPropertyOpacity, oldStyle, newStyle) && affects(CSSPropertyOpacity)) {
+        snapshotCompositableProperty(CSSPropertyOpacity, element, newStyle);
+        changed = true;
+    }
+
+    if (!CSSPropertyEquality::propertiesEqual(CSSPropertyTransform, oldStyle, newStyle) && affects(CSSPropertyTransform)) {
+        snapshotCompositableProperty(CSSPropertyTransform, element, newStyle);
+        changed = true;
+    }
+
+    if (!CSSPropertyEquality::propertiesEqual(CSSPropertyWebkitFilter, oldStyle, newStyle) && affects(CSSPropertyWebkitFilter)) {
+        snapshotCompositableProperty(CSSPropertyWebkitFilter, element, newStyle);
+        changed = true;
+    }
+
+    return changed;
+}
+
+void KeyframeEffectModelBase::snapshotCompositableProperty(CSSPropertyID property, const Element* element, const RenderStyle& style)
+{
+    auto& keyframes = m_keyframeGroups->get(property)->m_keyframes;
+    for (size_t i = 0; i < keyframes.size(); i++) {
+        auto& keyframe = toStringPropertySpecificKeyframe(*keyframes[i]);
+        if (!keyframe.value())
+            keyframe.setAnimatableValue(CSSAnimatableValueFactory::create(property, style));
+        else if (!keyframe.getAnimatableValue())
+            keyframe.setAnimatableValue(StyleResolver::createAnimatableValueSnapshot(const_cast<Element&>(*element), property, *keyframe.value()));
+    }
+}
+
 KeyframeEffectModelBase::KeyframeVector KeyframeEffectModelBase::normalizedKeyframes(const KeyframeVector& keyframes)
 {
     double lastOffset = 0;
     KeyframeVector result;
     result.reserveCapacity(keyframes.size());
 
     for (const auto& keyframe : keyframes) {
         double offset = keyframe->offset();
         if (!isNull(offset)) {
             ASSERT(offset >= 0);
@@ skipping 60 matching lines @@
 }
 
 void KeyframeEffectModelBase::ensureInterpolationEffect(Element* element) const
 {
     if (m_interpolationEffect)
         return;
     m_interpolationEffect = InterpolationEffect::create();
 
     for (const auto& entry : *m_keyframeGroups) {
         const PropertySpecificKeyframeVector& keyframes = entry.value->keyframes();
-        ASSERT(keyframes[0]->composite() == AnimationEffect::CompositeReplace);
+        ASSERT(keyframes[0]->composite() == AnimationEffect::CompositeReplace || keyframes[0]->composite() == AnimationEffect::CompositeAdd);
         for (size_t i = 0; i < keyframes.size() - 1; i++) {
-            ASSERT(keyframes[i + 1]->composite() == AnimationEffect::CompositeReplace);
+            ASSERT(keyframes[i + 1]->composite() == AnimationEffect::CompositeReplace || keyframes[i + 1]->composite() == AnimationEffect::CompositeAdd);
             double applyFrom = i ? keyframes[i]->offset() : (-std::numeric_limits<double>::infinity());
             double applyTo = i == keyframes.size() - 2 ? std::numeric_limits<double>::infinity() : keyframes[i + 1]->offset();
             if (applyTo == 1)
                 applyTo = std::numeric_limits<double>::infinity();
 
             m_interpolationEffect->addInterpolationsFromKeyframes(entry.key, element, *keyframes[i], *keyframes[i + 1], applyFrom, applyTo);
         }
     }
 }
 
@@ skipping 70 matching lines @@
 }
 
 void KeyframeEffectModelBase::PropertySpecificKeyframeGroup::trace(Visitor* visitor)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_keyframes);
 #endif
 }
 
 } // namespace